Dimensional crossover of quantum critical behavior in CeCoIn5

被引：40

作者：

Donath, J. G. ^{[1
]}

Steglich, F. ^{[1
]}

Bauer, E. D. ^{[2
]}

Sarrao, J. L. ^{[2
]}

Gegenwart, P. ^{[3
]}

机构：

[1] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[3] Univ Gottingen, Inst Phys 1, D-37077 Gottingen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.100.136401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The nature of quantum criticality in CeCoIn5 is studied by low-temperature thermal expansion alpha(T). At the field-induced quantum critical point at H = 5T a crossover scale T-star approximate to 0.3 K is observed, separating alpha(T)/T proportional to T-1 from a weaker T-1/2 divergence. We ascribe this change to a crossover in the dimensionality of the critical fluctuations which may be coupled to a change from unconventional to conventional quantum criticality. Disorder, whose effect on quantum criticality is studied in CeCoIn5-xSnx (0 <= x <= 0.18), shifts T-star towards higher temperatures.

引用

页数：4

共 26 条

[1] Thermodynamic and transport investigation of CeCoIn5-xSnx [J].

Bauer, E. D. ;

Ronning, F. ;

Capan, C. ;

Graf, M. J. ;

Vandervelde, D. ;

Yuan, H. Q. ;

Salamon, M. B. ;

Mixson, D. J. ;

Moreno, N. O. ;

Brown, S. R. ;

Thompson, J. D. ;

Movshovich, R. ;

Hundley, M. F. ;

Sarrao, J. L. ;

Pagliuso, P. G. ;

Kauzlarich, S. M. .

PHYSICAL REVIEW B, 2006, 73 (24)

[2] Superconductivity in CeCoIn5-xSnx:: Veil over an ordered state or novel quantum critical point? -: art. no. 047001 [J].

Bauer, ED ;

Capan, C ;

Ronning, F ;

Movshovich, R ;

Thompson, JD ;

Sarrao, JL .

PHYSICAL REVIEW LETTERS, 2005, 94 (04)

[3] Avoided antiferromagnetic order and quantum critical point in CeCoIn5 -: art. no. 257001 [J].

Bianchi, A ;

Movshovich, R ;

Vekhter, I ;

Pagliuso, PG ;

Sarrao, JL .

PHYSICAL REVIEW LETTERS, 2003, 91 (25)

[4] How do Fermi liquids get heavy and die? [J].

Coleman, P ;

Pépin, C ;

Si, QM ;

Ramazashvili, R .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2001, 13 (35) :R723-R738

[5] Perturbing the superconducting planes in CeCoIn5 by Sn substitution -: art. no. 016406 [J].

Daniel, M ;

Bauer, ED ;

Han, SW ;

Booth, CH ;

Cornelius, AL ;

Pagliuso, PG ;

Sarrao, JL .

PHYSICAL REVIEW LETTERS, 2005, 95 (01)

[6] Pressure effect on superconductivity in CeCoIn5-xSnx studied by thermal expansion [J].

Donath, J. G. ;

Gegenwart, P. ;

Kuechler, R. ;

Oeschler, N. ;

Steglich, F. ;

Bauer, E. D. ;

Sarrao, J. L. .

PHYSICA B-CONDENSED MATTER, 2006, 378-80 :98-99

[7] Quantum criticality in heavy-fermion metals [J].

Gegenwart, Philipp ;

Si, Qimiao ;

Steglich, Frank .

NATURE PHYSICS, 2008, 4 (03) :186-197

[8] Pressure-induced superconductivity in quasi-2D CeRhIn5 [J].

Hegger, H ;

Petrovic, C ;

Moshopoulou, EG ;

Hundley, MF ;

Sarrao, JL ;

Fisk, Z ;

Thompson, JD .

PHYSICAL REVIEW LETTERS, 2000, 84 (21) :4986-4989

[9]

Kawasaki Y, 2003, J PHYS SOC JPN, V72, P2308, DOI [10.1143/JPSJ.72.2308, 10.1143/JPSJ.72.72.2308]

[10] Quantum criticality in the cubic heavy-fermion system CeIn3-xSnx [J].

Kuechler, R. ;

Gegenwart, P. ;

Custers, J. ;

Stockert, O. ;

Caroca-Canales, N. ;

Geibel, C. ;

Sereni, J. G. ;

Steglich, F. .

PHYSICAL REVIEW LETTERS, 2006, 96 (25)

← 1 2 3 →